Two- and three-electron bubbles in Al${}_x$Ga${}_{1-x}$As/Al${}_{0.24}$Ga${}_{0.76}$As quantum wells

Abstract

We report on transport signatures of eight distinct bubble phases in the $N=3$ Landau level of a Al${}_x$Ga${}_{1-x}$As/Al${}_{0.24}$Ga${}_{0.76}$As quantum well with $x=0.0015$. These phases occur near partial filling factors ${\nu }^{\star }\approx 0.2(0.8)$ and ${\nu }^{\star }\approx 0.3(0.7)$ and have $M=2$ and $M=3$ electrons (holes) per bubble, respectively. We speculate that a small amount of alloy disorder in our sample helps to distinguish these broken symmetry states in low-temperature transport measurements.

4 pages

References in corpus (6)

• Competition between quantum-liquid and electron-solid phases in intermediate Landau levels
• Microscopic Theory of the Reentrant IQHE in the First and Second Excited LLs
• De-Pinning Transition of Bubble Phases in a High Landau Level
• Fine structure of high-power microwave-induced resistance oscillations
• Nonequilibrium transport in density-modulated phases of the second Landau level
• Electron-Hole Asymmetric Chiral Breakdown of Reentrant Quantum Hall States

Cited by in corpus (10)

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• A Highly Correlated Topological Bubble Phase of Composite Fermions
• Particle-Hole Symmetry and the Reentrant Integer Quantum Hall Wigner Solid
• Magnetotransport patterns of collective localization near $\nu =1$ in a high-mobility two-dimensional electron gas
• Stability of multielectron bubbles in high Landau levels
• Disorder broadening of even denominator fractional quantum Hall states in the presence of a short-range alloy potential
• Hidden Quantum Hall Stripes in Al${}_x$Ga${}_{1-x}$As/Al${}_{0.24}$Ga${}_{0.76}$As Quantum Wells
• Thermal Activation Signatures of the Anderson Insulator and the Wigner Solid forming near $\nu =1$
• Apparent inconsistency between Streda formula and Hall conductivity in reentrant integer quantum anomalous Hall effect in twisted MoTe${}_2$